Backflow Prevention: Protecting Your Water Supply

A backflow prevention device (often shortened to “backflow device” or “backflow preventer”) is a mechanical valve arrangement that automatically blocks any reverse movement of water. Inside the body of the valve are one-way check mechanisms and, in higher-risk models, a relief zone that dumps water to atmosphere if backward pressure builds.

The moment flow tries to reverse, the checks snap shut or the relief port opens, keeping the dirty side physically separated from the clean side.

Depending on the your hazard rating, the specifics of your plumbing system, and relevant building codes, different types of backflow preventers are warranted.

At Woden Valley Plumbing, our backflow plumbers have in-depth expertise with all devices certified for backflow prevention in the Canberra region. We stay current on the latest standards and installation best practices so we can educate you on your options and prevent contaminated water.

Protecting your water supply is our top priority.

The air gap is the simplest mechanical backflow prevention device, providing a physical separation between the drinking water outlet and the receiving vessel’s flood-level rim. While effective, air gaps can be prone to bypass through splashing and require adequate drainage.

Reduced Pressure Zone (RPZ) Valve

RPZ valves, with their two independently operating check valves, are well-suited for high-hazard backflow device installations. However, they require regular testing and maintenance. RPZ valves protect against both back pressure and back siphonage.

Double Check Valve Assembly (DCVA)

Also equipped with two positive-seating check valves, DCVAs offer protection against only backflow caused by backwater pressure. Regular testing is still essential to ensure performance. These are common in fire sprinkler systems.

Atmospheric Vacuum Breaker (AVB)

AVBs allow air to enter the backflow device to prevent siphoning and backflow. As non-testable devices, they can only be used to isolate hazards under specific conditions.

Pressure Vacuum Breaker (PVB)

With more moving parts than an AVB, PVBs offer testable protection against back siphonage for continuous pressure conditions. Proper installation is vital for this backflow prevention device to function correctly.

Choosing which type of backflow prevention device is right for your water supply depends on weighing factors like the associated risk, pressure conditions, complexity, and cost. Our experts at Woden Valley Plumbing can simplify this decision and ensure your safety. Contact us today.

While no property is immune to the risk of potential contamination, some buildings and facilities are more vulnerable than others. Understanding the most critical applications for a certified backflow prevention device is vital.

Some common situations where it’s an absolute necessity to have an effective backflow prevention device installed include the following:

Residential Applications

Even residential customers can sometimes benefit from backflow devices for their homes. Irrigation systems, swimming pools with piping connections, and properties with onsite water features may require atmospheric or pressure vacuum breakers for their water supply system.

Commercial and Industrial Applications

Businesses and factories with complex plumbing systems using hazardous chemicals, processed water, or holding tanks typically need advanced protection like RPZ valves or DCVAs.

Fire Protection Systems

Nearly all fire sprinkler systems need to double-check valves at a minimum to prevent backflow contamination risks. Reduced water pressure devices may also be warranted under certain conditions to offer maximum safety.

Irrigation and Lawn Sprinkler Systems

All underground irrigation and lawn sprinkler systems connected to your main water supply should have atmospheric or pressure vacuum breaker devices installed to safeguard your drinking water.

Getting prevention devices correctly installed is critical for their functioning and your ongoing safety. Our team at Woden Valley Plumbing has the experience to do the job right the first time.

• All our plumbers are fully licensed in the ACT region
• We supply only approved backflow prevention products from reputable brands
• You get transparent quotes with no hidden charges

Initial Consultation

We assess your current plumbing system, intended uses for water supply, and potential hazards. This allows us to determine the optimal backflow protection devices for your application. We can advise you on all code compliance needs as well.

Permit Applications

Where mandated, we submit necessary permit paperwork and plans to authorities on your behalf so you avoid headaches

Precision Installation

With years of experience, our licensed plumbers expertly install approved backflow preventers according to all specifications from the manufacturer and the latest codes. Correct valve placement is assured.

Backflow Prevention Testing and Reporting

We conduct leak tests, confirm proper operations of moving parts, test backflow prevention devices, and any other mandated checks before generating installation reports for your records and submission to regulators.

Note: Australian water utilities require your backflow prevention device to be certified every 12 months by a licensed, backflow-endorsed plumber if there is a high-or medium-hazard connection (e.g.irrigation with fertiliser injections, commercial kitchens, hospitals, and chemical dosing lines)

With over two decades of experience providing exceptional plumbing services to Canberra homes and businesses, Woden Valley Plumbing has the expertise to handle all your backflow prevention requirements.

To learn more about how we can protect your water supply through certified backflow solutions, please contact us today at (02) 6288 5123 or info@wodenvalleyplumbing.com.au.